46 Henry Quastler 



5. Limiting value : 



-(.8 logo .8 + .15 log, .15 + .05 logo .05) = .883 

 Single event code: 

 A 1 .8 

 B 1 .3 

 C .1 



1.20 -0.883 



1.20, excess is — = 36 per cent. 



0.883 



Two-event code: 



Event pair Prob. Code 



.60 .44 



.40 ^ 



H(x) = .97 



8. The curve looks similar to F(p), but has a flatter top and is symmetrical, with a 

 maximum of 1.0 at p{l) = .50. 



9. H(x) = log2 3 = 1.58 



-p log, p 



